function displayRow1(){
var row = document.getElementById("captionRow1");
if (row.style.display == '')  row.style.display = 'none';
else row.style.display = '';
}

function displayRow2(){
var row = document.getElementById("captionRow2");
if (row.style.display == '')  row.style.display = 'none';
else row.style.display = '';
}

function displayRow3(){
var row = document.getElementById("captionRow3");
if (row.style.display == '')  row.style.display = 'none';
else row.style.display = '';
}